A.3 | B.4 | C.5 | D.6 |
A.①②④③ | B.②①④③ | C.③④①② | D.④③②① |
A.0.01 mol•L-1 | B.0.017 mol•L-1 |
C.0.05 mol•L-1 | D.0.50 mol•L-1 |
A.当pH=7时,一定有:c(Na+)=c(CH3COO-)=c(OH-)=c(H+) |
B.当a=25时,一定有:c(CH3COO-)+c(CH3COOH)=c(Na+) |
C.当c(CH3COO-)>c(Na+)时,a一定大于12.5 |
D.当c(OH-)>c(H+)时,a一定小于12.5 |
A.9.0 | B.9.5 | C.10.5 | D.11.0 |
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